1. (

• stubborn ,
• obstinate ,
• unregenerate ,

) tenaciously unwilling or marked by tenacious unwillingness to yield ;

2. (

• unregenerate ,
• unregenerated

) not reformed morally or spiritually; "unregenerate human nature"; "unregenerate conservatism" ;

3. (

• unreformable ,
• unregenerate

) unrepentant and incapable of being reformed; "an unregenerate criminal" ;